[INFO] fetching crate clienv 0.1.0...
[INFO] checking clienv-0.1.0 against try#998b6603a58e47f42ccce7a67943234e96b6839e for pr-143170
[INFO] extracting crate clienv 0.1.0 into /workspace/builds/worker-4-tc2/source
[INFO] started tweaking crates.io crate clienv 0.1.0
[INFO] finished tweaking crates.io crate clienv 0.1.0
[INFO] tweaked toml for crates.io crate clienv 0.1.0 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate clienv 0.1.0 on toolchain 998b6603a58e47f42ccce7a67943234e96b6839e
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+998b6603a58e47f42ccce7a67943234e96b6839e" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate clienv 0.1.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+998b6603a58e47f42ccce7a67943234e96b6839e" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+998b6603a58e47f42ccce7a67943234e96b6839e" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ccc7100ce86d0dfa936e2d0679f1cda20fc645bd479217871318c7a291d4c660
[INFO] running `Command { std: "docker" "start" "-a" "ccc7100ce86d0dfa936e2d0679f1cda20fc645bd479217871318c7a291d4c660", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ccc7100ce86d0dfa936e2d0679f1cda20fc645bd479217871318c7a291d4c660", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ccc7100ce86d0dfa936e2d0679f1cda20fc645bd479217871318c7a291d4c660", kill_on_drop: false }`
[INFO] [stdout] ccc7100ce86d0dfa936e2d0679f1cda20fc645bd479217871318c7a291d4c660
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+998b6603a58e47f42ccce7a67943234e96b6839e" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 83c63e8deb0d04b68d6d2b83decb1635584f10b3fd48bd1a6dc690d2ad0abc9a
[INFO] running `Command { std: "docker" "start" "-a" "83c63e8deb0d04b68d6d2b83decb1635584f10b3fd48bd1a6dc690d2ad0abc9a", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.170
[INFO] [stderr]     Checking aho-corasick v1.1.3
[INFO] [stderr]     Checking anstyle v1.0.10
[INFO] [stderr]    Compiling proc-macro2 v1.0.94
[INFO] [stderr]     Checking log v0.4.26
[INFO] [stderr]     Checking utf8parse v0.2.2
[INFO] [stderr]    Compiling crossbeam-utils v0.8.21
[INFO] [stderr]    Compiling num-traits v0.2.19
[INFO] [stderr]     Checking anstyle-parse v0.2.6
[INFO] [stderr]     Checking colorchoice v1.0.3
[INFO] [stderr]     Checking once_cell v1.20.3
[INFO] [stderr]     Checking anstyle-query v1.1.2
[INFO] [stderr]     Checking is_terminal_polyfill v1.70.1
[INFO] [stderr]     Checking strsim v0.11.1
[INFO] [stderr]     Checking anstream v0.6.18
[INFO] [stderr]    Compiling portable-atomic v1.11.0
[INFO] [stderr]    Compiling heck v0.5.0
[INFO] [stderr]     Checking clap_builder v4.5.31
[INFO] [stderr]     Checking crossbeam-epoch v0.9.18
[INFO] [stderr]    Compiling anyhow v1.0.97
[INFO] [stderr]    Compiling rustix v1.0.1
[INFO] [stderr]     Checking regex-automata v0.4.9
[INFO] [stderr]    Compiling doc-comment v0.3.3
[INFO] [stderr]    Compiling getrandom v0.3.1
[INFO] [stderr]    Compiling quote v1.0.39
[INFO] [stderr]     Checking float-cmp v0.10.0
[INFO] [stderr]     Checking console v0.15.11
[INFO] [stderr]     Checking crossbeam-deque v0.8.6
[INFO] [stderr]     Checking linux-raw-sys v0.9.2
[INFO] [stderr]    Compiling syn v2.0.99
[INFO] [stderr]     Checking termtree v0.5.1
[INFO] [stderr]     Checking predicates-tree v1.0.12
[INFO] [stderr]    Compiling assert_cmd v2.0.16
[INFO] [stderr]     Checking wait-timeout v0.2.1
[INFO] [stderr]     Checking indicatif v0.17.11
[INFO] [stderr]     Checking bstr v1.11.3
[INFO] [stderr]     Checking regex v1.11.1
[INFO] [stderr]     Checking predicates v3.1.3
[INFO] [stderr]     Checking globset v0.4.16
[INFO] [stderr]     Checking ignore v0.4.23
[INFO] [stderr]     Checking globwalk v0.9.1
[INFO] [stderr]     Checking tempfile v3.18.0
[INFO] [stderr]     Checking assert_fs v1.1.2
[INFO] [stderr]    Compiling clap_derive v4.5.28
[INFO] [stderr]     Checking clap v4.5.31
[INFO] [stderr]     Checking clap-verbosity-flag v3.0.2
[INFO] [stderr]     Checking clienv v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]  --> src/lib.rs:9:13
[INFO] [stdout]   |
[INFO] [stdout] 9 |             writeln!(writer, "{}", line);
[INFO] [stdout]   |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]   = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]   = note: this warning originates in the macro `writeln` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]  --> src/lib.rs:9:13
[INFO] [stdout]   |
[INFO] [stdout] 9 |             writeln!(writer, "{}", line);
[INFO] [stdout]   |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]   = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]   = note: this warning originates in the macro `writeln` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: found module declaration for lib.rs
[INFO] [stdout]  --> src/main.rs:4:1
[INFO] [stdout]   |
[INFO] [stdout] 4 | mod lib;
[INFO] [stdout]   | ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: lib.rs is the root of this crate's library target
[INFO] [stdout]   = help: to refer to it from other targets, use the library's name as the path
[INFO] [stdout]   = note: `#[warn(special_module_name)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Write` and `self`
[INFO] [stdout]  --> src/main.rs:3:15
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::io::{self, Write};
[INFO] [stdout]   |               ^^^^  ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: found module declaration for lib.rs
[INFO] [stdout]  --> src/main.rs:4:1
[INFO] [stdout]   |
[INFO] [stdout] 4 | mod lib;
[INFO] [stdout]   | ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: lib.rs is the root of this crate's library target
[INFO] [stdout]   = help: to refer to it from other targets, use the library's name as the path
[INFO] [stdout]   = note: `#[warn(special_module_name)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Write` and `self`
[INFO] [stdout]  --> src/main.rs:3:15
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::io::{self, Write};
[INFO] [stdout]   |               ^^^^  ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `log` is never used
[INFO] [stdout]   --> src/lib.rs:14:8
[INFO] [stdout]    |
[INFO] [stdout] 14 | pub fn log()-> Result<(), Box<dyn std::error::Error>>{
[INFO] [stdout]    |        ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `answer` is never used
[INFO] [stdout]   --> src/lib.rs:27:8
[INFO] [stdout]    |
[INFO] [stdout] 27 | pub fn answer()->i32{
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]  --> src/lib.rs:9:13
[INFO] [stdout]   |
[INFO] [stdout] 9 |             writeln!(writer, "{}", line);
[INFO] [stdout]   |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]   = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]   = note: this warning originates in the macro `writeln` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `log` is never used
[INFO] [stdout]   --> src/lib.rs:14:8
[INFO] [stdout]    |
[INFO] [stdout] 14 | pub fn log()-> Result<(), Box<dyn std::error::Error>>{
[INFO] [stdout]    |        ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `answer` is never used
[INFO] [stdout]   --> src/lib.rs:27:8
[INFO] [stdout]    |
[INFO] [stdout] 27 | pub fn answer()->i32{
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]  --> src/lib.rs:9:13
[INFO] [stdout]   |
[INFO] [stdout] 9 |             writeln!(writer, "{}", line);
[INFO] [stdout]   |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]   = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]   = note: this warning originates in the macro `writeln` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 22.88s
[INFO] running `Command { std: "docker" "inspect" "83c63e8deb0d04b68d6d2b83decb1635584f10b3fd48bd1a6dc690d2ad0abc9a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "83c63e8deb0d04b68d6d2b83decb1635584f10b3fd48bd1a6dc690d2ad0abc9a", kill_on_drop: false }`
[INFO] [stdout] 83c63e8deb0d04b68d6d2b83decb1635584f10b3fd48bd1a6dc690d2ad0abc9a